79136977 has 2 divisors, whose sum is σ = 79136978. Its totient is φ = 79136976.

The previous prime is 79136971. The next prime is 79136987. The reversal of 79136977 is 77963197.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41486481 + 37650496 = 6441^2 + 6136^2 .

It is a cyclic number.

It is not a de Polignac number, because 79136977 - 2¹⁵ = 79104209 is a prime.

It is a super-2 number, since 2×79136977² = 12525322257397058, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79136977.

It is not a weakly prime, because it can be changed into another prime (79136971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39568488 + 39568489.

It is an arithmetic number, because the mean of its divisors is an integer number (39568489).

Almost surely, 2^79136977 is an apocalyptic number.

It is an amenable number.

79136977 is a deficient number, since it is larger than the sum of its proper divisors (1).

79136977 is an equidigital number, since it uses as much as digits as its factorization.

79136977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 500094, while the sum is 49.

The square root of 79136977 is about 8895.8966383384. The cubic root of 79136977 is about 429.3318937916.

The spelling of 79136977 in words is "seventy-nine million, one hundred thirty-six thousand, nine hundred seventy-seven".